{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":496,"cluster_id":4960002454,"lat":17.485,"lng":75.655},"signals":[{"signal":"temperature","resolved_at":"2026-08-30T06:08:58Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":496,"cluster_id":4960002454,"value":{"temperature_c_idw":28.3969},"valid_time":{"kind":"valid_time","requested":"2026-08-30T06:08:58Z","served_window_start_utc":"2026-08-30T05:16:43+00:00","served_window_end_utc":"2026-08-30T06:16:43+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"imd_idw_station","support_m":null,"detail":{"temperature_c_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2058,"pin_sha256":"67a5a25cc8e7638d37ca1929c4b1ed336f2985a7527f8a8bc356070513688661","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-30T06:16:43+00:00","support_kind":"imd_idw_station","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}},{"signal":"rainfall_imd","resolved_at":"2026-08-30T06:08:58Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":496,"cluster_id":4960002454,"value":{"rainfall_mm_24h_idw":0.8705},"valid_time":{"kind":"valid_time","requested":"2026-08-30T06:08:58Z","served_window_start_utc":"2026-08-30T05:16:43+00:00","served_window_end_utc":"2026-08-30T06:16:43+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"imd_idw_station","support_m":null,"detail":{"rainfall_mm_24h_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2058,"pin_sha256":"67a5a25cc8e7638d37ca1929c4b1ed336f2985a7527f8a8bc356070513688661","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-30T06:16:43+00:00","support_kind":"imd_idw_station","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}},{"signal":"rainfall","resolved_at":"2026-08-30T01:08:58Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"after_observed_window","message":"`at` 2026-08-30T01:08:58Z is after the latest witnessed instant (2026-08-29T17:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-08-30T08:38:57Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":496,"cluster_id":4960002454,"value":{"aqi_pm2_5_idw":17.5013,"aqi_pm10_idw":null,"aqi_no2_idw":null,"aqi_so2_idw":2.1954,"aqi_co_idw":25.1558,"aqi_ozone_idw":null},"valid_time":{"kind":"valid_time","requested":"2026-08-30T08:38:57Z","served_window_start_utc":"2026-08-30T08:00:52+00:00","served_window_end_utc":"2026-08-30T09:00:52+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"cpcb_idw_district","support_m":null,"detail":{"aqi_pm2_5_n_stations":4,"aqi_pm10_n_stations":0,"aqi_no2_n_stations":0,"aqi_so2_n_stations":3,"aqi_co_n_stations":2,"aqi_ozone_n_stations":0},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_m_v1","pin_seq":1347,"pin_sha256":"c4a24c7fdb245f7b1baa36f6a7e4c8d78a6b405e7227dc19048014945ed2a7a6","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-30T09:00:52+00:00","support_kind":"cpcb_idw_district","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}},{"signal":"weather_google","resolved_at":"2026-08-30T08:38:57Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"weather_google","unit":"google_weather_mixed","admin_code":496,"cluster_id":4960002454,"value":{"temperature_c_idw":29.1294,"rainfall_mm_24h_idw":3.7903,"humidity_pct_idw":59.4918,"wind_speed_kmph_idw":21.5919},"valid_time":{"kind":"valid_time","requested":"2026-08-30T08:38:57Z","served_window_start_utc":"2026-08-30T08:06:48+00:00","served_window_end_utc":"2026-08-30T09:06:48+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"google_weather_idw_station","support_m":null,"detail":{"temperature_c_n_stations":3,"rainfall_mm_24h_n_stations":3,"humidity_pct_n_stations":3,"wind_speed_kmph_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_google_v1","pin_seq":1787,"pin_sha256":"6322d0eb7a06d05fc4c994604b058b60a850854d59184795f1feb9aa17e96ac7","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-30T09:06:48+00:00","support_kind":"google_weather_idw_station","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}}]}